2 /************************************************************************/
3 /* File iSeries_pci_reset.c created by Allan Trautman on Mar 21 2001. */
4 /************************************************************************/
5 /* This code supports the pci interface on the IBM iSeries systems. */
6 /* Copyright (C) 20yy <Allan H Trautman> <IBM Corp> */
8 /* This program is free software; you can redistribute it and/or modify */
9 /* it under the terms of the GNU General Public License as published by */
10 /* the Free Software Foundation; either version 2 of the License, or */
11 /* (at your option) any later version. */
13 /* This program is distributed in the hope that it will be useful, */
14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
16 /* GNU General Public License for more details. */
18 /* You should have received a copy of the GNU General Public License */
19 /* along with this program; if not, write to the: */
20 /* Free Software Foundation, Inc., */
21 /* 59 Temple Place, Suite 330, */
22 /* Boston, MA 02111-1307 USA */
23 /************************************************************************/
24 /* Change Activity: */
25 /* Created, March 20, 2001 */
26 /* April 30, 2001, Added return codes on functions. */
27 /* September 10, 2001, Ported to ppc64. */
28 /* End Change Activity */
29 /************************************************************************/
30 #include <linux/kernel.h>
31 #include <linux/init.h>
32 #include <linux/module.h>
33 #include <linux/pci.h>
34 #include <linux/irq.h>
37 #include <asm/iSeries/HvCallPci.h>
38 #include <asm/iSeries/HvTypes.h>
39 #include <asm/iSeries/mf.h>
42 #include <asm/iSeries/iSeries_pci.h>
46 * Interface to toggle the reset line
47 * Time is in .1 seconds, need for seconds.
49 int iSeries_Device_ToggleReset(struct pci_dev *PciDev, int AssertTime,
52 unsigned long AssertDelay, WaitDelay;
53 struct iSeries_Device_Node *DeviceNode =
54 (struct iSeries_Device_Node *)PciDev->sysdata;
56 if (DeviceNode == NULL) {
57 printk("PCI: Pci Reset Failed, Device Node not found for pci_dev %p\n",
62 * Set defaults, Assert is .5 second, Wait is 3 seconds.
65 AssertDelay = (5 * HZ) / 10;
67 AssertDelay = (AssertTime * HZ) / 10;
70 WaitDelay = (30 * HZ) / 10;
72 WaitDelay = (DelayTime * HZ) / 10;
77 DeviceNode->ReturnCode = HvCallPci_setSlotReset(ISERIES_BUS(DeviceNode),
78 0x00, DeviceNode->AgentId, 1);
79 if (DeviceNode->ReturnCode == 0) {
80 set_current_state(TASK_UNINTERRUPTIBLE);
81 schedule_timeout(AssertDelay); /* Sleep for the time */
82 DeviceNode->ReturnCode =
83 HvCallPci_setSlotReset(ISERIES_BUS(DeviceNode),
84 0x00, DeviceNode->AgentId, 0);
87 * Wait for device to reset
89 set_current_state(TASK_UNINTERRUPTIBLE);
90 schedule_timeout(WaitDelay);
92 if (DeviceNode->ReturnCode == 0)
93 PCIFR("Slot 0x%04X.%02 Reset\n", ISERIES_BUS(DeviceNode),
96 printk("PCI: Slot 0x%04X.%02X Reset Failed, RCode: %04X\n",
97 ISERIES_BUS(DeviceNode), DeviceNode->AgentId,
98 DeviceNode->ReturnCode);
99 PCIFR("Slot 0x%04X.%02X Reset Failed, RCode: %04X\n",
100 ISERIES_BUS(DeviceNode), DeviceNode->AgentId,
101 DeviceNode->ReturnCode);
103 return DeviceNode->ReturnCode;
105 EXPORT_SYMBOL(iSeries_Device_ToggleReset);